I've spent a lot of time over the years on photo-sharing websites. I tend to seek out pretty models. And more often than not, they are of the perspective that there's something despicable about anyone using their images for sexual purposes. Here, for a change, is a woman who espouses the sex-positive view that I've taken, that there is nothing wrong or disturbing about somebody having a sexual response to an image you've taken and shared with the world:
Sexual Gratification and My Pictures [broken link]
"Once I give my creation to the world I relinquish my control and regardless of my purpose or intent, your interpretation is yours and yours alone."